I want to install OSX in VirtualBox (on an Intel machine) with host openSUSE. I need the DVD but I think some versions are different? Will this one work? Mac OS X 10.6 Snow Leopard - Apple Store (U.S.)
what about this one? Amazon.com: Mac OS X version 10.6.3 Snow Leopard: Software
And after I install that, can I download (via the Mac App Store) and upgrade to Mountain Lion also within VirtualBox?
If Vbox can see your DVD drive then yes it will install the Snow Leopard. Upgrades? I have no experience in Apple stuff, but if Ubu & Opensuse are an indicator an upgrade maybe problematical.
Then too the great part about a VM is if it goes bad your main machine is still OK. Then you know at the very least that your OSX Snow Leopard install will work.
One more thing since the 20USD version comes from Apple why not get the lower cost version?